This is a tough question! According to the
results of scientific experiments, the universe
was created about 15 billion years ago! This
means 15,000,000,000 year ago. We can say this by
the understandings of modern science, but still
there are intriguing and complex questions. The
creation of the Universe is based on the theory of
the Big Bang, and this theory says that about 15
billion years ago a tremendous explosion started
the expansion of the universe. At this point, all
the matter and energy of space was contained at
one point. What existed before the Big Bang is
completely unknown and is a matter of pure
speculation. The Big Bang was not a normal
explosion but rather an explosion of space within
itself, unlike an explosion of a bomb were
fragments are thrown outward.

It was a
scientist named Edwin Hubble who started the
theory of the Big Bang. Hubble made the
observation that the universe is continuously
expanding. He discovered that a galaxy's velocity
is proportional to its distance. Galaxies that are
twice as far from us move twice as fast. Another
consequence is that the universe is expanding in
every direction. This observation means that it
has taken every galaxy the same amount of time to
move from a common starting position to its
current position. Just as the Big Bang explains
the origin of the universe, Hubbles observations
explain the origin of the Big Bang theory.